I always assumed the key word here was “indoor,” and not “vertical.” Indoors is a place where it is much, much, easier to automate and control growing conditions. Both could add up to faster better cheaper. Given how amazingly huge; dense; and performant logistics has gotten, I can’t imagine the real estate angle is moving the needle very much.
Indoors is much more expensive though. You've got to build the buildings and all the infrastructure. Outdoors in big simple fields has a lot of pluses. And it's time-tested. There's no particular reason to think that the majority of food will ever be grown indoors, or even a small but significant fraction of it. Not on Earth anyway.
